CERATONEREIS FAKARAVAE. 213 



Nereis pelagica Linne. 



Syst. nat., cd. 10, 1758, 1, p. 654; Blai.wille, Diet. sci. nat., 1828, 57, p. 470; Quatrefages, Hist. 



nat. annelcs, 1865, 1, p. 542; Ehlers, Borsten^viirmer, 1868, p. 511, pi. 20, fig. 11-20; McIntosh, 



British annelids, 1910, 2, pt. 2, p. 267, pi. 52, fig. 1, 2, pi. 60, fig. 6, 6a, pi. 71, fig. 7, 7i, pi. 80, fig. 



25, 25b. 

 Nereis fernujinea Gunxer, Skrift. Kjobenb. selskab., 1770, 10, p. 169, pi. e, fig. 10. 

 Nereis verrticosa O. F. Muli.er, Zool. Daiiica prodr., 1776, p. 217. 

 Nereis fimbriata O. F. Mui.ler, Op. cit., 1776, p. 217. 



Nereis margalicera Blaixville, Op. cit., 1828, 57, p. 470; Qu.atrefages, Op. cit., 1865, 1, p. 510. 

 Lycoris inargaritacea Johxstox, Zool. journ., 1829, 4, p. 420. 

 Lycoris viridis John.ston, Op. cit., 1829, 4, p. 419. 

 Nereis fulgens Daltell, Pow. creat., 1853, 2, p. 153, pi. 22, fig. 6-8. 

 Heteronereis arclica Oer.sted, Nat. tids., 1842, 4, p. 117 (epitokous female). 

 Heteronereis assi?n.His Oersted, Op. cit., 1842, 4, p. 117 (epitokous female). 

 Nereis renalis Johxston, Ann. nat. hist., 1840, 5, p. 176 (epitokous male). 

 Heteronereis arctica Oersted, Gronlands Annulata dorsibranchiata, 1843, p. 179, fig. 50, 51, 60, 65, 68, 



70 (epitokous male). 

 INereilepas fusca Oersted, Annulatorum Danicorum conspectus, 1843, p. 21, fig. 49, 50 (epitokous 



female). 

 Nereis grandifolia H. Rathke, Beitr. fauna Norweg., 1843, p. 155, pi. 7, fig. 13, 14 (epitokous male). 

 Nereis denlicidata Stimpson, Invertb. Grand Manan, 1853, p. 33, fig. 23 (epitokous female). 

 Nereis reynaudi Qu.\tref.\ges, Op. cit., 1865, 1, p. 519. 

 Nereis bowerbanckii Quatref.\ges, Op. cit., 1865, 1, p. 541. 



Locality. Two specimens in the collection bear simply the label "Alba- 

 tross, 1886." They doubtless come from the Atlantic North American Coast, 

 and probably off southern New England. 



The species is common off both shores of the Atlantic and occurs also in the 

 Pacific. It is found between tide-marks and at moderate depths. 



Ceratonereis Kinberg. 



Ofvers. K. vet. akad. Forh., 1865, no. 4, p. 170; St. Joseph, Ann. sci. nat., 1897, ser. 5, 8, p. 285. 

 Nereis (Ceratonereis) Gravibk, Nouv. arch. Mus. hist, nat., 1900, ser. 4, 2, p. 157, 172. 



Ceratonereis fakaravae, sp. nov. 

 Plate 35, fig. 6-8. 



The type-specimen bears eighty-eight pau's of fully developed parapodia 

 in addition to three smaller pahs on a regenerating caudal tip. Length 65 imn.; 

 greatest width between bases of the parapodia (third and fourth somites), 4 

 mm. ; between tips of parapodia at same point, about 5.25 mm. 



Prostomium clearly wider than long, in a ratio of about five to four. Pre- 

 ocular portion rectangular, abruptly and considerably narrower than the ocular, 

 which is narrowed forwards and has its anterior margin semicircular, marked 



